Table 1 Characteristics of studies included in the meta-analyses

From: Serotonin transporter genotype 5HTTLPR as a marker of differential susceptibility? A meta-analysis of child and adolescent gene-by-environment studies

Study

N

Positive/negative a

Age

Ethnicity b

Genotyping triallelic

Assessment

      

environment

outcome

Bakermans et al. (2012)

37

Negative

<10

Caucasian

No

Observation

Observation

Benjet et al. (2010)

78

Negative

10

Mixed

No

Self-report

Self-report

Brody et al. (2009)

419

Positive

10

Mixed

No

Observation

Self-report

Cicchetti et al. (2010)

850

Negative

<10

Mixed

No

Observation

Self-report

Cicchetti et al. (2011)

92

Positive

<10

Mixed

No

Observation

Observation

Drury et al. (2012)

100

Positive

<10

Caucasian

No

Observation

Other report

Eley et al. (2004)

220

Negative

10

Caucasian

No

Other report

Self-report

Eley et al. (2011)

344

Positive

<10

Caucasian

No

Observation

Observation

Fox et al. (2005)

73

Positive

<10

Caucasian

No

Other report

Observation

Gibb et al. (2011)

74

Negative

<10

Caucasian

No

Observation

Observation

Gilissen et al. (2008)

87

Positive

<10

Caucasian

No

Observation

Observation

Hankin et al. (2012)

220

Negative

10

Mixed

Yes

Other report

Self-report

Ivorra et al. (2010)

317

Negative

<10

Caucasian

No

Other report

Other report

Jacobs et al. (2011)

123

Negative

10

Caucasian

Yes

Other report

Observation

Kaufman et al. (2004)

101

Negative

10

Mixed

No

Observation

Self-report

Kochanska et al. (2011)

88

Positive

<10

Caucasian

No

Observation

Other report

Luijk et al. (2011)

512

Positive

<10

Caucasian

No

Observation

Observation

Kumsta et al. (2010)

64

Negative

10

Caucasian

No

Observation

Other report

Mueller et al. (2011)

115

Negative

<10

Caucasian

Yes

Self-report

Observation

Nijmeijer et al. (2010)

194

Negative

10

Caucasian

No

Other report

Other report

Nilsson et al. (2005)

196

Positive

10

Caucasian

No

Self-report

Self-report

Nobile et al. (2007)

689

Negative

10

Caucasian

No

Other report

Other report

Paaver et al. (2008)

435

Positive

10

Caucasian

No

Self-report

Self-report

Pauli-Pott et al. (2009)

69

Positive

<10

Caucasian

No

Observation

Observation

Pluess et al. (2011)

1513

Negative

<10

Caucasian

No

Other report

Other report

Sadeh et al. (2010)

296

Positive

10

Mixed

No

Other report

self-report

Sonuga et al. (2009)

681

Positive

10

Caucasian

No

Observation

Other report

Spangler et al. (2009)

94

Negative

<10

Caucasian

No

Observation

Observation

Sugden et al. (2010)

1174

Negative

10

Caucasian

No

Self-report

Other report

Sulik et al. (2012)

106

Positive

<10

Caucasian

No

Observation

Other report

  1. Notes.
  2. aPositive=study providing effect size of the association between supportive environment and positive developmental outcomes; negative=study providing effect size of the association between adverse environment and negative developmental outcome.
  3. bCaucasian=>80% of the sample Caucasian.